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| Number | Title | Issue Date |
| 8182154 | Fluid dynamic bearing system The invention relates to a fluid dynamic bearing system that comprises at least one stationary part that has a shaft and two bearing plates disposed on the shaft at a mutual spacing, and at least one rotating part that is supported so as to rotate about a rotational... | 05/22/2012 |
| 8115356 | Fluid dynamic bearing system The invention relates to a fluid dynamic bearing system having a first conical bearing and a second conical bearing working in opposition to the first conical bearing, the conical bearings being disposed along a stationary shaft. The first conical bearing has a firs... | 02/14/2012 |
| 8018100 | Permanent magnet motor having an axially magnetized pull magnet A permanent magnet motor having an axially magnetized pull magnet consisting of a baseplate on which a stator lamination stack having stator windings is disposed, wherein a hub is disposed opposite the baseplate, the hub being connected to a shaft that is supported ... | 09/13/2011 |
| 8007177 | Fluid dynamic bearing system A fluid dynamic bearing system that has a first bearing part and a second bearing part that is rotatable with respect to the first bearing part, both of which form a bearing gap filled with a bearing fluid between opposing bearing surfaces. ... | 08/30/2011 |
| 7982349 | Spindle motor having a fluid dynamic bearing system and a stationary shaft The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component (14) which encloses a stationary shaft (12), which in turn is connected at both its ends to axially alig... | 07/19/2011 |
| 7928822 | Bobbin, coil-wound bobbin, and method of producing coil-wound bobbin A bobbin includes a spool portion having a hollow circular cylinder shape and adapted to have a wire wound thereon in multilayer alignment; a flange integrally disposed at one end of the spool portion; and a terminal block integrally disposed at the flange and adapt... | 04/19/2011 |
| 7893628 | Electronic circuit for operating a plurality of gas discharge lamps at a common voltage source The presented circuit makes it possible to operate a plurality of gas discharge lamps, particularly cold cathode tubes, at a common voltage source. The uniform distribution of current to all the lamps is achieved without using any magnetic components, but only using... | 02/22/2011 |
| 7866890 | Spindle motor having a fluid dynamic bearing system The invention relates to a spindle motor having a fluid dynamic bearing system that comprises a base (10), a stationary shaft (14) connected to the base, a hub (16) rotatably supported with respect to the shaft and two bearing plates (24, 44 | 01/11/2011 |
| 7866889 | Fluid dynamic bearing system A fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bea... | 01/11/2011 |
| 7852013 | Electronic stabilizer circuit for suppressing startup instabilities in cold cathode fluorescent lamps According to the present invention an electronic stabilizer circuit for suppressing startup instabilities when supplying a cold cathode fluorescent lamp with current is proposed which is connected in series with a power supply line of the cold cathode fluorescent la... | 12/14/2010 |
| 7825557 | Spindle motor having a fluid dynamic bearing system and a stationary shaft The invention relates to a spindle motor having a fluid dynamic bearing system that contains a rotor component taking the form of an integrated hub/bearing bush arrangement which encloses a straight, stationary shaft, which in turn is connected at both its ends to a... | 11/02/2010 |
| 7814801 | Bend sensor A bend sensor according to one aspect of the present invention is a bend sensor for sensing a bend of a base member in a longitudinal direction comprising: the base member; and a plurality of strain sensitive elements which are disposed at different positions in a w... | 10/19/2010 |
| 7800289 | Electrodeless gas discharge lamp The invention relates to an electrodeless high frequency gas discharge lamp according to the induction principle that, as a result of its design and construction, shows particularly low electromagnetic interference with a simultaneous increase in light efficiency. T... | 09/21/2010 |
| 7791833 | Spindle motor having a deep-drawn baseplate The invention relates to a spindle motor having a deep-drawn baseplate and an aperture to receive and secure a bearing system to rotatably support a rotor. To avoid having to machine the bearing receiving portion of the baseplate in a complex process, the invention ... | 09/07/2010 |
| 7755299 | Transformer for balancing currents The invention relates to a transformer (10) for balancing the current in an AC circuit, comprising a primary winding (12), a secondary winding (14) and a main inductance (16). The transformer is characterized in that a capacitive componen... | 07/13/2010 |
| 7723884 | Permanent magnetic motor having a magnetic axial bearing A permanent magnetic motor having a magnetic axial bearing and one or more fluid bearings, wherein a stator unit is disposed on a baseplate, the stator unit being disposed opposite a magnet ring made up of permanent magnets and being separated from the magnet ring b... | 05/25/2010 |
| 7699529 | Fluid dynamic bearing having pressure-generating surface patterns A fluid dynamic bearing system having pressure-generating asymmetric surface patterns, having at least two bearing parts that are rotatable with respect to each other and form a bearing gap filled with a bearing fluid between associated bearing surfaces. The surface... | 04/20/2010 |
| 7669734 | Dosing systems for fluid media A dosing system to dispense a predetermined quantity of a fluid medium comprises a digital signal processor control having an interface to emit a start signal and a stop signal and an interface to measure a sensor signal. A dispenser is provided that is triggered by... | 03/02/2010 |
| 7642689 | Rotor structure A rotor includes: a magnet having a circular cylinder shape and having a hole formed through its axial center, wherein the hole has in axial cross section a regular polygonal shape having flat portions and angle portions, and wherein a recess having a truncated cone... | 01/05/2010 |
| 7626302 | Stator component for an electric motor The present invention relates to a stator component for an electric motor. The stator component for an internal rotor motor comprises a circular stator yoke having an inner periphery, a number of poles, the poles spaced apart from each other along the inner peripher... | 12/01/2009 |
| 7625125 | Spindle motor The invention relates to a spindle motor having a fluid dynamic bearing system used particularly for driving the storage disks of hard disk drives, having a baseplate, a stationary bearing bush disposed in an opening in the baseplate, a shaft rotatably supported in ... | 12/01/2009 |
| 7602582 | Fluid dynamic bearing system The bearing system according to the invention comprises a sleeve-shaped first bearing disk having a bore concentric to a rotational axis, a cylindrical shaft disposed in the bore and connected to the first bearing disk, the shaft having a second bearing disk dispose... | 10/13/2009 |
| 7567009 | Stator arrangement for an electric machine and a method for manufacturing the stator arrangement A stator arrangement for an electric machine having a stator body which has a back yoke ring and a number of stator teeth that project in a radial direction from the back yoke ring, wherein at least one additional ferromagnetic stator end lamination is mounted on at... | 07/28/2009 |
| 7554219 | DC/DC converter having an input switching stage and a plurality of output channels A DC/DC converter having an input switching stage on the primary side and a plurality of output channels on the secondary side of the converter, each output channel having a secondary control loop and a monitoring device, the monitoring devices monitoring the operat... | 06/30/2009 |
| 7528526 | Piezoelectric drive unit and method for generating a preferably rotating drive movement for such a drive unit The invention relates to a piezoelectric drive unit and a method for generating a preferably rotating drive movement for such a drive unit. The drive unit comprises a stator (1), a rotor, embodied to rotate about a rotational axis (2), with relation to... | 05/05/2009 |
| 7517153 | Fluid dynamic bearing system The invention relates to a fluid dynamic bearing system that has a stationary sleeve, a stationary shaft disposed in the sleeve and bearing disks disposed on the sleeve and shaft which form an annular disk-shaped space between each other in which an annular disk-sha... | 04/14/2009 |
| 7491957 | Optical displacement sensor An optical displacement sensor structure includes a plurality of light receiving elements and a plurality of optical fibers together with one light source, wherein light emitted from the one light source is efficiently introduced into the plurality of optical fibers... | 02/17/2009 |
| 7465097 | Fluid dynamic bearing system The invention relates to a fluid dynamic bearing system particularly to rotatably support a spindle motor to drive the disk(s) of a hard disk drive. The bearing system comprises a bearing sleeve and a shaft accommodated in a bore in the bearing sleeve and rotatably ... | 12/16/2008 |
| 7436279 | High voltage transformer The invention relates to a high voltage transformer having a double symmetric winding arrangement. The transformer comprises a closed core (10) having a first and a second leg (12, 14), a first and a second coil member (16; 18) having a first en... | 10/14/2008 |
| 7429846 | Stepping motor control apparatus A stepping motor control apparatus that is able to electrically detect the load of the stepping motor and effectively prevent step-outs by means of an inexpensive configuration. The stepping motor control apparatus is equipped with a microcomputer (10) that o... | 09/30/2008 |
| 7420307 | Brushless motor The invention relates to a brushless DC motor having an at least two-pole permanent magnet rotor and an at least two-pole stator whose poles carry an at least single-strand stator winding which can be energized with a current according to the rotor position by means... | 09/02/2008 |
| 7417342 | Holder for winding wires for stators of electric motors The invention relates to a holder for the winding wires for stators of electric motors consisting of a component to be disposed on the stator having means for holding and guiding the winding wires that run between the individual stator windings. According to the inv... | 08/26/2008 |
| 7416652 | Method for manufacturing an electrode for the electrochemical machining of a workpiece and an electrode manufactured according to this method The invention relates to a method for manufacturing a tool electrode for the electrochemical machining of workpieces, particularly for components for fluid bearings with the following processing steps: (a) Providing an electrode body made of a conductive base materi... | 08/26/2008 |
| 7413348 | Fluid dynamic air bearing system to rotatably support a motor The invention relates to a fluid dynamic air bearing system to rotatably support a motor. The bearing system comprises a stationary shaft, a bearing bush partially enclosing the shaft and connected to the shaft, a bearing plate partially enclosing the shaft and conn... | 08/19/2008 |
| 7413347 | Fluid dynamic bearing system A fluid dynamic bearing system having at least one stationary part and one rotating part that form a bearing gap filled with bearing fluid between the opposing bearing surfaces, at least one end of the bearing gap being open and sealed against the environment by a s... | 08/19/2008 |
| 7397215 | Modulation method for bridge circuits for the particular control of direct current motors The invention relates to methods and systems for modulating the supply voltage of an electric load, particularly an electric motor, fed by a bridge circuit, wherein the load is switched as a function of a predetermined setpoint value for the input current or the inp... | 07/08/2008 |
| 7382598 | Means for controlling a coil arrangement with electrically variable inductance The invention relates to a special control for current-controlled inductors which allows inductance to be varied at a considerably faster rate than is the case in the prior art. The control presented in the invention can be employed for coil arrangements which carry... | 06/03/2008 |
| 7379267 | Disc clamp with snap fit for a disc drive The invention relates to a disc clamp for mounting an information storage disc to a rotating hub of a spindle motor assembly, and a disc drive spindle hub assembly comprising said disc clamp. The disc clamp comprises an annular body portion, an inner centering porti... | 05/27/2008 |
| 7374341 | Hydrodynamic bearing arrangement for an electric motor The invention relates to a hydrodynamic bearing arrangement for an electric motor, particularly for a spindle motor to drive the platters of a hard disk drive. The bearing arrangement comprises a shaft, a bearing bush and a thrust plate disposed fixedly on the shaft... | 05/20/2008 |
| 7357577 | Hydrodynamic bearing system having means for measuring the filling level of the lubricant The invention relates to a hydrodynamic bearing arrangement, particularly for a spindle motor to drive the platters of a hard disk drive, the bearing arrangement having a shaft and a bearing bush, which, supported by a lubricant circulating between their bearing sur... | 04/15/2008 |
